An application in the default release starts when you double-click a file with an extension such as .prj or .pcb or run an automation script. Normally, the release registered last is the default, but you can choose a different release to be the default.
The following procedure shows an example of choosing a new default VX release.
If you want a pre-VX release to be the default, follow the procedure in “Switching Between Releases When One or More is Not Side-by-Side Compatible”. The pre-VX release you choose will be the only registered release and, therefore, becomes the default.
You have at least two registered VX releases.
You have administrator privileges on the system.
The registrator.exe program runs from the installation tree of the release in the Switch To Release field, making that release the default. Now when you double-click a file with an extension such as .prj or .pcb or run an automated script, an application in that release starts.